CN102112779A

CN102112779A - Acceleration and deceleration device

Info

Publication number: CN102112779A
Application number: CN2009801295820A
Authority: CN
Inventors: 东崎康嘉; 吉见壮司; 园部浩之; 盐津勇; 松本将
Original assignee: Waseda University; Mitsubishi Heavy Industries Ltd
Current assignee: Waseda University; Mitsubishi Heavy Industries Ltd
Priority date: 2008-10-14
Filing date: 2009-10-06
Publication date: 2011-06-29
Anticipated expiration: 2029-10-06
Also published as: KR20110031356A; EP2336600B1; US20110136619A1; US8672792B2; WO2010044357A1; CN102112779B; EP2336600A1; JP2010096209A; EP2336600A4; JP5138535B2; KR101248306B1

Abstract

The present invention relates to an acceleration and deceleration device. A first rotating shaft (2) and a second rotating shaft (3) are disposed in a rotatable fashion around an axis of rotation (L). The second rotating shaft (3) has a cylindrical support part (11) that covers an end part of the first rotating shaft (2). A casing (4) supports the first rotating shaft (2) and the second rotating shaft (3). A first roller bearing (5) is disposed between the first rotating shaft (2) and the casing (4) so as to support the first rotating shaft (2) in a rotatable fashion. A second roller bearing (6) is disposed between the support part (11) and the first rotating shaft (2) so as to support the first rotating shaft (2) and the second rotating shaft (3) while allowing them to rotate relative to each other. A transmission part (11A) of the second rotating shaft (3) transmits a preload for pressing the second rotating shaft (3) toward the first rotating shaft (2) to the second roller bearing (6). A pressure receiving part (31A) of the casing (4) receives the preload that is transmitted from the second roller bearing (6) to the first roller bearing (5).

Description

The increase and decrease quick-mounting is put

Technical field

The present invention relates to increase and decrease quick-mounting puts.

Background technique

In the past, known had a kind of traction drive device, and it is put as the increase and decrease quick-mounting, changes in transferring power from the rotating speed of input shaft input and from output shaft output (for example, refer to Patent Document 1 and non-patent literature 1).

Patent documentation 1:(Japan) spy opens the 2002-243011 communique

Non-patent literature 1: red plumage political affairs people, close that open-minded, refreshing paddy is held well, Shu Tianjin is just sharp, " use the bearing of planetary mechanism migrate formula retarder " 2007 annual accurate engineerings can Spring Meeting lecture joint performance be said collection of thesis, 2007, and the 979-980 page or leaf

Put with the increase and decrease quick-mounting that uses gear and to compare, above-mentioned traction drive utensil has noise, the little advantage of vibration.But, the problem that is difficult to realize large-scale reduction speed ratio in one-level is also arranged.

On the other hand, in the disclosed traction drive device in non-patent literature 1 (bearing migrate formula retarder), the problem that exists the rate of skidding to increase with the increase of output torque.

That is, in non-patent literature 1 in the disclosed structure, move vertically relative to housing by the foreign steamer that makes angular contact ball bearing and to apply precompressed.In this structure, utilize the frictional force that acts between foreign steamer and the housing and static, if the output torque increases, the rotating force that then acts on foreign steamer surpasses frictional force, may make between foreign steamer and the housing skid (rate of skidding increase).

Summary of the invention

In view of above problem, the objective of the invention is to, provide a kind of and can suppress to vibrate, noise, the generation of skidding and can realize that the increase and decrease quick-mounting of reduction speed ratio is put on a large scale.

In order to reach above purpose, the invention provides following technology.

Increase and decrease quick-mounting of the present invention is put and is comprised: first running shaft, and it is configured to and can rotates around spin axis; Second running shaft, it is configured to and can has the cylindric support that covers the described first running shaft end around described spin axis rotation; Housing, it supports described first running shaft and described second running shaft; First rolling bearing, it is configured between described first running shaft and the described housing, rotatably mounted described first running shaft; Second rolling bearing, it is configured between described support and described first running shaft, can support described first running shaft and described second running shaft with the relative rotation; Pre-splenium, it is arranged on the described housing, applies the precompression with described first rotation shaft side extruding of described second axial rotary; The transfer part of described second running shaft, its described precompression that will be applied to described second running shaft is passed to described second rolling bearing; The compression zone of described housing, it bears the described precompression that is passed to described first rolling bearing from described second rolling bearing.

According to the present invention, be applied to precompression on second running shaft from pre-splenium, after being passed to second rolling bearing, via second rolling bearing and first rolling bearing and bear by the compression zone of housing via transfer part.At this, because pre-splenium and compression zone all are arranged on the housing, therefore can apply precompression to second rolling bearing and first rolling bearing reliably, on transmission of torque, apply sufficient precompressed.

By with second axial rotary, first rotation shaft side extruding and apply precompression, therefore can not make between second rolling bearing and support and first running shaft along the relative displacement of spin axis direction, thereby second rolling bearing is executed by precompressed to second rolling bearing.Equally, owing to apply precompression, therefore can not make between first rolling bearing and housing and first running shaft along the relative displacement of spin axis direction, thereby first rolling bearing is applied in precompressed to first rolling bearing.

In other words, make second rolling bearing not move, to make first rolling bearing first rolling bearing and second rolling bearing not to be installed even utilize relative to support and first running shaft relative to the method that housing and first running shaft move, also can transmission of torque apply precompressed to first rolling bearing and second rolling bearing fully, thereby can prevent skidding in first rolling bearing and second rolling bearing.

In foregoing invention, described first rolling bearing is had: wheel in first, it is connected with described second rolling bearing and can transmits described precompression, be provided with the first inboard rolling surface, the described first inboard rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radial outside at least; First foreign steamer, it is connected with described compression zone and can transmits described precompression, is provided with first outside rolling surface, and described first outside rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radial outside at least; First rolling element, it is configured to a plurality of and can rolls between the described first inboard rolling surface and described first outside rolling surface.Described second rolling bearing is had: second foreign steamer, it is connected with described transfer part and can transmits described precompression, be provided with second outside rolling surface, described second outside rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radially inner side at least; Wheel in second, it is connected with described first rolling bearing and can transmits described precompression, is provided with the second inboard rolling surface, and the described second inboard rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radially inner side at least; Second rolling element, it is configured to a plurality of and can rolls between the described second inboard rolling surface and described second outside rolling surface.

According to the present invention, the precompression that is applied to second running shaft from pre-splenium is passed to second foreign steamer of second rolling bearing via transfer part.The precompression that is passed to second foreign steamer is passed to wheel in second via second outside rolling surface, second rolling element and the second inboard rolling surface, and further is passed to the first interior wheel of first rolling bearing.

The precompression that is passed to wheel in first is passed to first foreign steamer via the first inboard rolling surface, first rolling element and first outside transmission plane.The precompression that is passed to first foreign steamer is born by the compression zone of housing.

The reaction force that acts on the direction opposite with precompression is passed to wheel in first from compression zone.Therefore, between the wheel and first foreign steamer, first rolling element is pushed to compression direction in first.In other words, first rolling element be squeezed between the first inboard rolling surface and first outside rolling surface and be applied in precompressed.

Reaction force is passed to wheel in second from compression zone via first rolling bearing.Therefore, between the wheel and second foreign steamer, second rolling element is pushed to compression direction in second.In other words, second rolling element is compressed between the second inboard rolling surface and second outside rolling surface and is applied in precompressed.

In foregoing invention, preferably with the race way diameter E2 of the race way diameter F2 of the race way diameter E1 of the race way diameter F1 of the first inboard rolling surface, first outside rolling surface, the second inboard rolling surface, second outside rolling surface rotating ratio i by the rotation speed n 5 of the rotation speed n 1 of representing first running shaft with following formula (1) and second running shaft.

i＝n1/n5

＝E2(F1+F2)/(E2F1-E1F2) …(1)

According to the present invention, the difference of the product of the race way diameter F2 of the product of the race way diameter E2 by regulating second outside rolling surface and the race way diameter F1 of the first inboard rolling surface and the race way diameter E1 of first outside rolling surface and the second inboard rolling surface can be regulated the rotating ratio i of the rotation speed n 2 of the rotation speed n 1 of first running shaft and second running shaft.

In foregoing invention, preferably adjust the race way diameter F1 of the described first inboard rolling surface and the race way diameter E1 of described first outside rolling surface by first wrapping angle that changes described first rolling bearing.

In foregoing invention, preferably adjust the race way diameter F2 of the described second inboard rolling surface and the race way diameter E2 of described second outside rolling surface by second wrapping angle that changes described second rolling bearing.

According to the present invention, can use first rolling bearing and second rolling bearing of roughly the same specification, and can regulate the rotating ratio i of the rotation speed n 2 of the rotation speed n 1 of first running shaft and second running shaft.

In other words, though spin axis be first rolling element at center and second rolling element the revolution radius about equally, by regulating first wrapping angle or second wrapping angle, also can regulate rotational speed and compare i.

Also have, owing to first rolling element roughly can equate with the revolution diameter of second rolling element, so it is roughly more cylindric than what be easier to form that holding part is become.

In foregoing invention, preferably make at least one side in described first rolling element and described second rolling element be roughly spherical.

According to the present invention, in first rolling element and first in wheel and the contacting of first foreign steamer, second rolling element and second contacting to point of wheel and second foreign steamer contact.For example, be that the situation that line contacts is compared with making rolling element and contacting of interior wheel and foreign steamer, stirring (Stir mixes) loss when first rolling element or second rolling element rotate reduces.

In foregoing invention, preferably make at least one side in described first rolling element and described second rolling element be roughly the tapered roller shape.

According to the present invention, in first rolling element and first in wheel and the contacting of first foreign steamer, second rolling element and second wheel and contacting of second foreign steamer be that line contacts.For example, compare with contacting to the situation of some contact of interior wheel and foreign steamer with making rolling element, the transmission of torque area between first solid of rotation and second solid of rotation increases.

In foregoing invention, described the 3rd rolling bearing of described second running shaft of rotatable supporting and the 4th rolling bearing are arranged between described second running shaft and the described housing along described spin axis direction arrangement.

According to the present invention, bear by the 3rd rolling bearing and the 4th rolling bearing owing to act on the moment of the spin axis direction of vibration of second running shaft, therefore second running shaft is stably rotated around spin axis.

In foregoing invention, preferably making described the 4th rolling bearing is to have the roughly roller bearing of cylindric rolling element, described pre-splenium is taken turns to described the 3rd rolling bearing all round via of described the 4th rolling bearing apply precompression, make described the 3rd rolling bearing that described precompression is passed to described second running shaft.

According to the present invention, be roller bearing owing to make the 4th rolling bearing, therefore the moment that can further bear the spin axis direction of vibration that acts on second running shaft is reliably stably rotated second running shaft around spin axis.

Precompression from all round wheel be passed to the 3rd rolling bearing, and be passed to second running shaft from the 3rd rolling bearing.At this,, therefore,, also can continue rotatable supporting second running shaft on the spin axis direction even the solid of rotation of taking turns relative the 4th rolling bearing all round relatively moves because the 4th rolling bearing is that rolling element is a roller bearing roughly cylindraceous.

Increase and decrease quick-mounting according to the present invention is put, by be applied to the precompression on second running shaft from pre-splenium, can apply precompression to first rolling bearing and second rolling bearing reliably, therefore can play and suppress the generation of skidding and realize the effect of reduction speed ratio on a large scale.Further,, compare, can play the generation that suppresses vibration, noise and realize the effect of reduction speed ratio on a large scale with the situation of utilizing gear to carry out the rotating speed increase and decrease owing to utilize first rolling bearing and second rolling bearing to carry out the increase and decrease of rotating speed.

Description of drawings

Fig. 1 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation first embodiment of the invention.

Fig. 2 is the partial enlarged drawing of the input shaft surrounding structure of explanatory drawing 1.

Fig. 3 is the partial enlarged drawing of the output shaft surrounding structure of explanatory drawing 1.

Fig. 4 is the input side angular contact ball bearing of explanatory drawing 1 and the partial enlarged drawing of outlet side angular contact ball bearing structure.

Fig. 5 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation second embodiment of the invention.

Fig. 6 is the input side tapered roller bearing of explanatory drawing 5 and the partial enlarged drawing of outlet side tapered roller bearing structure.

Fig. 7 is the input side tapered roller bearing of explanatory drawing 6 and the partial enlarged drawing of outlet side tapered roller bearing structure.

Fig. 8 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation third embodiment of the invention.

Fig. 9 is the partial enlarged drawing of torque cam (the ト Le Network カ system) structure of explanatory drawing 8.

Figure 10 is the partial enlarged drawing of the precompressed of the torque cam of explanatory drawing 9 state when increasing.

Figure 11 is the schematic representation of other mode of executions of putting of the increase and decrease quick-mounting of explanatory drawing 8.

Figure 12 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation four embodiment of the invention.

Figure 13 is the input side planetary roller portion of explanation Figure 12 and the partial enlarged drawing of outlet side planetary roller bilge construction.

Description of reference numerals

1,101,201,301 increase and decrease quick-mountings are put

2 input shafts (first running shaft)

3 output shafts (second running shaft)

4 housings

5,105 input side angular contact ball bearings (first rolling bearing)

6,106 outlet side angular contact ball bearings (second rolling bearing)

7,107 holding parts

11 foreign steamer supports (support)

11A transfer surface (transfer part)

12 first block bearings (the 3rd rolling bearing)

13 second block bearings (the 4th rolling bearing)

24 second supporting foreign steamers (the wheel) all round

31A compression face (compression zone)

32 pre-spleniums

Wheel in 51,151 input sides (wheel in first)

52,152 input side foreign steamers (first foreign steamer)

53 input side balls (first rolling element)

The inboard rolling surface (the first inboard rolling surface) of 54,154,354 input sides

55,155,355 input sides outside rolling surface (first outside rolling surface)

Wheel in 61,161 outlet sides (wheel in second)

62,162 outlet side foreign steamers (second foreign steamer)

63 outlet side balls (second rolling element)

The inboard rolling surface (the second inboard rolling surface) of 64,164,364 outlet sides

65,165,365 outlet sides outside rolling surface (second outside rolling surface)

153 input side tapered rollers (first rolling element)

163 outlet side tapered rollers (second rolling element)

307 planet pins (holding part)

353 input side planetary rollers (first rolling element)

363 outlet side planetary rollers (second rolling element)

The L spin axis

α 1 wrapping angle (first wrapping angle)

α 2 wrapping angles (second wrapping angle)

Embodiment

[first mode of execution]

Below, referring to figs. 1 to Fig. 4 the increase and decrease quick-mounting of first embodiment of the invention is put and to be described.

Fig. 1 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation present embodiment.

In the present embodiment, it is the example that is used to make the rotating speed of the rotary driving force of input to slow down that increase and decrease quick-mounting of the present invention puts 1, but also can be used for quickening, and limits especially.

As shown in Figure 1, the increase and decrease quick-mounting is put 1 and is had: by external drive source (not shown) by the input shaft (first running shaft) 2 that drives with the rotation of regulation rotating speed; Based on the rotating ratio i of regulation and with the output shaft (second running shaft) 3 of the rotating speed rotation of slowing down; Can make input shaft 2 and output shaft 3 support the housing 4 of input shaft 2 and output shaft 3 rotatably around spin axis L; Rotation is passed to input side angular contact ball bearing (first rolling bearing) 5, outlet side angular contact ball bearing (second rolling bearing) 6 and the holding part 7 of output shaft 3 from input shaft 2.

In addition, can use traction lubricant oil to put 1 lubricant oil as the increase and decrease quick-mounting of present embodiment.Compare with using other lubricated oil conditions, use traction lubricant oil can transmit bigger power.

Input shaft 2 is by the roughly columnar component of the driving source rotation driving of outside, is used for rotary driving force is passed to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 etc.

As shown in Figures 1 and 2, input shaft 2 extends along spin axis L, and its output shaft 3 sides (right side of Fig. 1) are disposed at the inside of housing 4.Also have, the end of output shaft 3 sides of input shaft 2 is disposed at the inboard of the foreign steamer support 11 of output shaft 3.

Between input shaft 2 and foreign steamer support 11, be provided with outlet side angular contact ball bearing 6, between input shaft 2 and housing 4, be provided with input side angular contact ball bearing 5.Also have, between the outlet side angular contact ball bearing 6 and input side angular contact ball bearing 5 of input shaft 2, be provided with the 2A of blade of a sword portion, the described blade of a sword 2A of portion is outstanding from the circumferential surface of input shaft 2 towards radial outside, contacts with wheel 51 in the input side of wheel 61 and input side angular contact ball bearing 5 in the outlet side of outlet side angular contact ball bearing 6.

In other words, on the end (right-hand end of Fig. 1) of output shaft 3 sides of input shaft 2, be disposed with wheel 51 in the input side of outlet side angular contact ball bearing 6 from right to left, wheel 51 in the input side of the 2A of blade of a sword portion, input side angular contact ball bearing 5.

Output shaft 3 is the roughly columnar components that are rotated driving with the rotating speed by decelerations such as input side angular contact ball bearing 5, outlet side angular contact ball bearings 6.

As Fig. 1 and shown in Figure 3, output shaft 3 extends along spin axis L, and its input shaft 2 sides (left side of Fig. 1) are disposed at the inside of housing 4.Also have, on the end of input shaft 2 sides of output shaft 3, disposing with spin axis L is the roughly cylindric foreign steamer support (support) 11 of spin axis, is provided with transfer surface (transfer part) 11A that precompression is passed to outlet side angular contact ball bearing 6 in the inner peripheral surface side of foreign steamer support 11.

Transfer surface 11A is with respect to the face of spin axis L in the roughly ring-type of Vertical direction extension, contacts with the outlet side foreign steamer 62 of outlet side angular contact ball bearing 6.

As shown in Figure 2, between foreign steamer support 11 and input shaft 2, be provided with outlet side angular contact ball bearing 6, as shown in Figure 3, between output shaft 3 and housing 4, begin to be provided with successively first block bearing (the 3rd rolling bearing), 12 and second block bearing (the 4th rolling bearing) 13 from input shaft 2 sides.

In other words, on the inner peripheral surface of foreign steamer support 11, be provided with outlet side foreign steamer 62, on the circumferential surface of output shaft 3, begin to be provided with successively the interior wheel 25 of wheel 22 and second supporting in first supporting from input shaft 2 sides.

First block bearing 12 and second block bearing 13 are separated with on spin axis L direction and are spaced configuration, and can support output shaft 3 rotatably around spin axis L.

Thus, the moment that acts on the spin axis L direction of vibration of output shaft 3 is born by first block bearing 12 and second block bearing 13, therefore output shaft 3 is stably rotated around spin axis L.

First block bearing 12 is provided with wheel 22, the first supporting rolling element 23 in the first supporting foreign steamer 21, first supporting.Second block bearing 13 is provided with wheel 25, the second supporting rolling element 26 in 24, second supporting of the second supporting foreign steamer (the wheel) all round.

Wheel 22 is configured to contact with stepped part 3A in first supporting, and this stepped part 3A is outstanding to radial outside towards input shaft 2 sides from output shaft 3.

The first supporting foreign steamer 21 and the second supporting foreign steamer 24 can move along spin axis L direction with respect to housing 4, dispose precompressed with encircling 27 between the first supporting foreign steamer 21 and the second supporting foreign steamer 24, this precompressed is passed to first foreign steamer 21 with the precompressions that ring 27 will be applied to the second supporting foreign steamer 24.

In the present embodiment, first block bearing 12 is applicable to angular contact ball bearing, second block bearing 13 is applicable to roller bearing.

By second block bearing 13 is applicable to roller bearing, and can further bear the moment of the spin axis L direction of vibration that acts on output shaft 3 reliably, output shaft 3 is stably rotated around spin axis L.

Also have, precompression is passed to first block bearing 12 from the second supporting foreign steamer 24, and is passed to output shaft 3 from first block bearing 12.At this, because being roughly, the rolling element of second block bearing 13 is the cylindrical rollers bearing, therefore,, also can continue rotatably mounted output shaft 3 even the second supporting foreign steamer 24 moves along spin axis L direction relative to the rolling element of second block bearing 13.

As shown in Figure 1 to Figure 3, housing 4 can make input shaft 2 and output shaft 3 support input shaft 2 and output shaft 3 rotatably around spin axis L.

On shell 4, be provided with: inside contain input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 etc. cap 31, to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 apply precompressed pre-splenium 32, the housing body 33 of cap 31 and pre-splenium 32 is installed.

As shown in Figures 1 and 2, between cap 31 and housing body 33, be formed with columned space by input shaft 2 sides that cap 31 are installed in housing body 33, in formed space, contain foreign steamer support 11, input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6.

Cap 31 has round-ended cylinder shape parts for what have an opening in output shaft 3 sides, is formed with the through hole that input shaft 2 is inserted on the end face of input shaft 2 sides.

Between cap 31 and input shaft 2, be provided with input side angular contact ball bearing 5, between cap 31 and foreign steamer support 11, be provided with the gap.In other words, on the inner peripheral surface of cap 31, be provided with input side foreign steamer 52, between cap 31 and foreign steamer support 11, be formed with the gap that can make 11 rotations of foreign steamer support.

Be provided with compression face (compression zone) 31A on cap 31, compression face 31A contacts with the input foreign steamer 52 of input side angular contact ball bearing 5, bears precompression.Compression face 3 1A are the circular step face that extends towards output shaft 3 side direction radial outsides.

As shown in Figure 1 to Figure 3, pre-splenium 32 applies precompression via first block bearing 12, second block bearing 13 and output shaft 3 to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6, applies precompressed.

On pre-splenium 32, be provided with: produce precompressed bolt 41, first press section 42 and second press section 43 of precompressed, the load cell 44 of measurement precompressed.

Precompressed bolt 41 applies precompressed thereby produce to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 in that first press section 42 and second press section 43 are pressed to input shaft 2 sides with the first supporting foreign steamer 21 and the second supporting foreign steamer 24.

Precompressed bolt 41 runs through first through hole 45 and second through hole 46 that is formed at first press section 42 and second press section 43, screws togather with the tapped hole 48 of housing body 33.

First press section 42 is pressed to input shaft 2 sides with the precompressed bolt 41 and second press section 43 with the first supporting foreign steamer 21 and the second supporting foreign steamer 24, and produce input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 is applied precompressed.

First press section 42 is for being formed with the plate-shaped member that makes the hole that output shaft 3 runs through, and is configured in than second press section 43 more by the position of output shaft 3 sides (right side of Fig. 3).

On first press section 42, be formed with first through hole 45 that precompressed bolt 41 is run through, on the face relative, dispose load cell 44 with second press section 43.

Second press section 43 is pressed to input shaft 2 sides with the precompressed bolt 41 and first press section 42 with the first supporting foreign steamer 21 and the second supporting foreign steamer 24, and produce input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 is applied precompressed.

Second press section 43 is configured between first press section 42 and the housing body 33 for being formed with the plate-shaped member that makes the hole that output shaft 3 runs through.

On second press section 43, be formed with second through hole 46 that precompressed bolt 41 is run through, on the face relative, be formed with the cylindrical part 47 of the extruding second supporting foreign steamer 24 with housing 33.

Load cell 44 is configured between first press section 42 and second press section 43, is used to measure the precompressed that is passed to input side angular contact ball bearing 5 grades.

In addition, can use known device, but not limit especially as load cell 44.

In the above-described embodiment, the example of using load cell 44 to measure precompressed is illustrated, but also can between the precompressed bolt 41 and first press section 42, dispose elastic member such as helical spring and measure precompressed, limit especially based on helical spring decrement.

Cover 31 and pre-splenium 32 are installed on housing body 33, and housing body 33 makes input shaft 2 and output shaft 3 support input shaft 2 and output shaft 3 rotatably around spin axis L.

As Fig. 1 and shown in Figure 3, on housing body 33, be formed with the bolt hole 48 that screws togather with precompressed bolt 41.Also have, between housing body 33 and output shaft 3, be provided with first block bearing 12 and second block bearing 13, between first block bearing 12 and second block bearing 13, be provided with precompressed with encircling 27.

As shown in Figures 1 and 2, input side angular contact ball bearing 5 is angular contact ball bearings of being located between cap 31 and the input shaft 2, with outlet side angular contact ball bearing 6 and holding part 7, the rotating speed of input shaft 2 reduced and is passed to output shaft 3.

On input side angular contact ball bearing 5, be provided with: wheel in the input side (wheel in first) 51, input side foreign steamer (first foreign steamer) 52, input side ball (first rolling element) 53.

Wheel 51 is arranged on the ring-shaped member on the circumferential surface of input shaft 2 in the input side.

The radial outside of wheel 51 is provided with the inboard rolling surface of input side (the first inboard rolling surface) 54 that input side ball 53 rolls in input side.On the inboard rolling surface 54 of input side, be provided with from input shaft 2 to output shaft 3 towards the face that radial outside tilts, that is, bear the face of precompression.

Input side foreign steamer 52 is arranged on the ring-shaped member on cap 31 inner peripheral surfaces, for example, and with the inner peripheral surface interference fit of cap 31.

Radially inner side at input side foreign steamer 52 is provided with the input side outside rolling surface (first outside rolling surface) 55 that input side ball 53 rolls.On the rolling surface 55 of the input side outside, be provided with from input shaft 2 to output shaft 3 towards the face that radial outside tilts, in other words, be provided with the face that bears precompression.

In the present embodiment, illustrated that suitably wrapping angle (first wrapping angle) α 1 that makes input side angular contact ball bearing 5 is the situation about 30 °.

At this, wrapping angle α 1 is the angle that line of action is become with the radial plane, and described line of action is the line between the point of contact of rolling surface 55 outside point of contact and the input side ball 53 and the input side of the inboard rolling surface 54 of input side ball 53 and input side.

It is oblique to output shaft 3 inclinations towards spin axis L that input side angular contact ball bearing 5 is configured to line of action.

As shown in Figures 1 and 2, outlet side angular contact ball bearing 6 is angular contact ball bearings of being located between foreign steamer support 11 and the input shaft 2, with input side angular contact ball bearing 6 and holding part 7, the rotating speed of input shaft 2 reduced and be passed to output shaft 3.

On outlet side angular contact ball bearing 6, be provided with: wheel in the outlet side (wheel in second) 61, outlet side foreign steamer (second foreign steamer) 62, outlet side ball (second rolling element) 63.

Wheel 61 is arranged on the ring-shaped member on the circumferential surface of input shaft 2 in the input side, and the radial outside of wheel 61 is provided with the inboard rolling surface of outlet side (the first inboard rolling surface) 64 that outlet side ball 63 rolls in outlet side.On the inboard rolling surface 64 of outlet side, be provided with from output shaft 2 to output shaft 3 towards the face that radially inner side tilts, in other words, be provided with the face that bears precompression.

Outlet side foreign steamer 62 is arranged on the ring-shaped member on the inner peripheral surface of foreign steamer support 11, for example, and with foreign steamer support 11 interference fit.

Radially inner side at outlet side foreign steamer 62 is provided with the outlet side outside rolling surface (second outside rolling surface) 65 that outlet side ball 63 rolls.On the rolling surface 65 of the outlet side outside, be provided with from output shaft 2 to output shaft 3 towards the face that radially inner side tilts, in other words, be provided with the face that bears precompression.

In the present embodiment, about about the 40 ° situation of wrapping angle (second wrapping angle) α 2 that makes outlet side angular contact ball bearing 6 that is applicable to has been described.

At this, wrapping angle α 2 is angles that line of action is become with the radial plane, and described line of action is the line between the point of contact of rolling surface 65 outside point of contact and the outlet side ball 63 and the outlet side of the inboard rolling surface 64 of outlet side ball 63 and outlet side.

It is oblique to input shaft 2 inclinations towards spin axis L that outlet side angular contact ball bearing 6 is configured to line of action.

As shown in Figures 1 and 2, holding part 7 is the roughly cylinder-like parts that formed by materials such as for example Cuprum alloys, is used to keep input side ball 53 and outlet side ball 63.

By utilizing the holding part 7 that forms by Cuprum alloy, compare with the situation of using other material, can prolong the life-span of holding part 7, increase transferable torque.

Holding part 7 is the roughly cylinder-like part that extends along spin axis L, can be the center rotation with spin axis L.On input shaft 2 side ends of holding part 7, be formed with the notch that is used to keep input side ball 53, the quantity of this notch is corresponding with the quantity of input side ball 53.On output shaft 3 side ends, be formed with the notch that is used to keep outlet side ball 63, the quantity of this notch is corresponding with the quantity of outlet side ball 63.

Also have, on holding part 7 and slip surface input side ball 53 and outlet side ball 63, dispose resin with lubricity, for example, teflon (Teflon, registered trade mark) etc.Thus, can reduce slippage loss between holding part 7 and input side ball 53 and the outlet side ball 63.

Below, 1 effect that the increase and decrease quick-mounting of said structure put describes.

At first, to 3 rotation bang path describes from input shaft 2 to output shaft.

As shown in Figures 1 and 2, the rotation of input shaft 2 is passed to input side ball 53 via wheel 51 in the input side of input side angular contact ball bearing 5, and input side ball 53 is the center revolution with spin axis L.The revolution of input side ball 53 is passed to the outlet side ball 63 of outlet side angular contact ball bearing 6 via holding part 7.Is the center revolution by outlet side ball 63 with spin axis L, and rotation is passed to outlet side foreign steamer 62, and rotation is passed to output shaft 3 from outlet side foreign steamer 62 via foreign steamer support 11.

Below, the method that input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 is applied precompressed is described.

As Fig. 1 and shown in Figure 3, when applying precompressed,, produce the power (below, note is made " precompression ") that acts on first press section 42 towards input shaft 2 sides (left side of Fig. 3) by making precompressed bolt 41 rotation.Precompression is passed to second press section 43 from first press section 42 via load cell 44, its size is by load cell 44 and measured.

Thus, can know the size of the precompressed that is applied to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6.

The precompression that is passed to second press section 43 is passed to first from the cylindrical part 47 of second press section 43 via the second supporting foreign steamer 24, precompressed and supports foreign steamer 21 with ring 27.Because the first supporting foreign steamer 21, precompressed are configured to and can move along spin axis L direction with respect to housing 33 with the ring 27 and second supporting foreign steamer 24, so precompression can be passed to the first supporting foreign steamer 21.Also have,, therefore can not hinder the transmission of precompression because second block bearing 13 is a roller bearing.

Because first block bearing 12 is an angular contact ball bearing, the precompression that therefore is passed to the first supporting foreign steamer 21 is passed to wheel 22 in first supporting along its line of action, and then is passed to output shaft 3 from stepped part 3A.

As shown in Figures 1 and 2, the precompression that is passed to output shaft 3 is passed to the outlet side foreign steamer 62 of outlet side angular contact ball bearing 6 from transfer surface 11A, thereby outlet side angular contact ball bearing 6 is applied precompressed.

Also have, after precompression is passed to the 2A of blade of a sword portion of input shaft 2 at the line of action along outlet side angular contact ball bearing 6, is passed to from the 2A of blade of a sword portion in the input side of input side angular contact ball bearing 5 and takes turns 51, input side angular contact ball bearing 5 is applied precompressed.

Below, the rotating speed of input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 slowed down to be described.

At first, the rotating speed on the revolution direction of the input side ball 53 of input side angular contact ball bearing 5 is by representing with following formula (2).

n3＝(F1·n1+E1·n2)/(F1+E1) …(2)

Wherein, n1 is the rotating speed of wheel 51 in the input side, and n2 is the rotating speed of input side foreign steamer 52, and n3 is the rotating speed on the revolution direction of input side ball 53.In addition, F1 is the race way diameter of wheel 51 in the input side, and E1 is the race way diameter (with reference to figure 4) of input side foreign steamer 52.

Race way diameter F1 is and the relevant diameter of point of contact of the inboard rolling surface 54 of input side and input side ball 53, that is, and and the diameter of a circle of the set of this point of contact.Same race way diameter E1 is and the point of contact relevant diameter of input side outside rolling surface 55 with input side ball 53.

Do not rotate because input side foreign steamer 52 is configured on the cap 31, therefore, rotating speed is zero (n2=0), thereby above-mentioned formula (2) can be expressed as with following formula (3).

n3＝(F1·n1)/(F1+E1) …(3)

In addition, the rotating speed on the revolution direction of the outlet side ball 63 of outlet side angular contact ball bearing 6 is by representing with following formula (4).

n6＝(F2·n4+E2·n5)/(F2+E2) …(4)

Wherein, n4 is the rotating speed of wheel 61 in the outlet side, and n5 is the rotating speed of outlet side foreign steamer 62, and n6 is the rotating speed on the revolution direction of outlet side ball 63.In addition, F2 is the race way diameter of wheel 61 in the outlet side, and E2 is the race way diameter (with reference to figure 4) of outlet side foreign steamer 62.

Race way diameter F2 is and the relevant diameter of point of contact of the inboard rolling surface 64 of outlet side and outlet side ball 63, that is, and and the diameter of a circle of the set of this point of contact.Same race way diameter E2 is and the point of contact relevant diameter of outlet side outside rolling surface 65 with outlet side ball 63.

Therefore, the rotating speed of outlet side foreign steamer 62 is by representing with following formula (5).

n5＝((F2+E2)n6+F2·n4)/E2 …(5)

Because input side ball 53 and outlet side ball 63 are kept and revolution by holding part 7, the rotational speed on both revolution directions equates (n3=n6).Therefore, with formula (3) substitution formula (5) and cancellation n6, obtain with following formula (6).

n5＝((E2F1-E1F2)/E2(F1+E1))n1 …(6)

Based on above-mentioned formula (6), the rotating ratio i between input shaft 2 and the output shaft 3, promptly reduction speed ratio i is by representing with following formula (7).

i＝n1/n5

＝E2(F1+F2)/(E2F1-E1F2) …(7)

Therefore, by regulating each race way diameter F1, E1, F2, E2, can realize the rotating ratio i of various values.For example, the value i that can example goes out rotating ratio is 2.5,10,50,100 equivalences.

Also have,, input shaft 2 and output shaft 3 are rotated or rotation round about to equidirectional by the symbol of (E2F1-E1F2) in the regulating type (7).

Below, the regulating method of the value of each race way diameter F1, E1, F2, E2 is described.Particularly, the relation to relation, each race way diameter F2, E2 and the wrapping angle α 2 of each race way diameter F1, E1 and wrapping angle α 1 describes.

As shown in Figure 4, each race way diameter F1, E1 and wrapping angle α 1 have the relation with following formula (8) and formula (9).

F1＝Dpw1+(Dw1·cosα1)/2 …(8)

E1＝Dpw1-(Dw1·cosα1)/2 …(9)

Wherein, Dpw1 is the pitch diameter of input side angular contact ball bearing 5, and Dw1 is the diameter of input side ball 53.

Equally, each race way diameter F2, E2 and wrapping angle α 2 have the relation with following formula (10) and formula (11).

F2＝Dpw2+(Dw2·cosα2)/2 …(10)

E2＝Dpw2-(Dw2·cosα2)/2 …(11)

Wherein, Dpw2 is the pitch diameter of outlet side angular contact ball bearing 6, and Dw2 is the diameter of outlet side ball 63.

According to above-mentioned formula (8) to formula (11) as can be known: because pitch circle Dpw1, Dpw2, input side ball 53 Dw1,63 Dw2 are constant for the outlet side ball, therefore by regulating the value that wrapping angle α 1, wrapping angle α 2 can regulate each race way diameter F1, E1 and each race way diameter F2, E2.

Therefore, by the wrapping angle α 1 of adjusting input side angular contact ball bearing 5 and the wrapping angle α 2 of outlet side angular contact ball bearing 6, can regulate rotating ratio i.

According to said structure, be applied to the precompression of output shaft 3 from pre-splenium 32, via transfer surface 11A after being passed to outlet side angular contact ball bearing 6, via outlet side angular contact ball bearing 6 and input side angular contact ball bearing 5 and bear by the compression face 31A of housing 4.At this moment, because pre-splenium 32 and compression face 31A are arranged on the housing 4, therefore, can apply precompression to outlet side angular contact ball bearing 6 and input side angular contact ball bearing 5 reliably, thereby can apply the sufficient precompressed of transmission of torque.

By being pressed to input shaft 2 sides, output shaft 3 applies precompression to outlet side angular contact ball bearing 6, therefore can not make between outlet side angular contact ball bearing 6, foreign steamer support 11, the input shaft 2 to relatively move, thereby can apply precompressed outlet side angular contact ball bearing 6 along running shaft L direction.Equally, by applying precompression to input side angular contact ball bearing 5, can not make between input side angular contact ball bearing 5, housing 4, the input shaft 2 to relatively move, thereby can apply precompressed input side angular contact ball bearing 5 along running shaft L direction.

In other words, with making outlet side angular contact ball bearing 6 not move, to make input side angular contact ball bearing 5 outlet side angular contact ball bearing 6 and input side angular contact ball bearing 5 not to be installed, can transmission of torque apply precompressed to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 fully relative to foreign steamer support 11 and input shaft 2 relative to the method that housing 4 and input shaft 2 move.Thereby can prevent that the input side angular contact ball bearing 5 and second rolling bearing from skidding.

Particularly, the precompression that is applied to output shaft 3 from pre-splenium 32 is passed to the outlet side foreign steamer 62 of outlet side angular contact ball bearing 6 via transfer surface 11A.The precompression that is passed to outlet side foreign steamer 62 is passed to via outlet side outside rolling surface 65, outlet side ball 63, the inboard rolling surface 64 of outlet side and takes turns 61 in the outlet side, and then is passed to wheel 51 in the input side of input side angular contact ball bearing 5.

The precompression of wheel 51 is passed to input side foreign steamer 52 via rolling surface 55 outside the inboard rolling surface 54 of input side, input side ball 53, the input side in being passed to.The precompression that is passed to input side foreign steamer 52 is born by compression face 3 1A of housing 4.

Action direction and precompression opposite reaction are passed to from compression face 3 1A and take turns 51 in the input side.Therefore, between wheel 51 and the input side foreign steamer 52, input side ball 53 is pushed to compression direction in input side.In other words, input side ball 53 is by to be squeezed between inboard rolling surface 54 of input side and the input side outside rolling surface 55 and to apply precompressed.

Reaction force is passed to via input side angular contact ball bearing 5 from compression face 31A and takes turns 61 in the outlet side.Therefore, between wheel 61 and the outlet side foreign steamer 62, outlet side ball 63 is pushed to compression direction in outlet side.In other words, outlet side ball 63 is by to be squeezed between inboard rolling surface 64 of outlet side and the outlet side outside rolling surface 65 and to apply precompressed.

As the formula (7), the value of the difference of the product of the race way diameter E1 of the race way diameter E2 by regulating outlet side outside rolling surface 65 and the product of the race way diameter F1 of the inboard rolling surface 54 of input side and input side outside rolling surface 55 and the race way diameter F2 of outlet side inboard rolling surface 64 can be regulated the rotating ratio i of the rotation speed n 2 of the rotation speed n 1 of input shaft 2 and output shaft 3.

Also have, because that regulate is the wrapping angle α 2 of the wrapping angle α 1 of input side angular contact ball bearing 5 or outlet side angular contact ball bearing 6 and what regulate is the value of each race way diameter F1, E1, F2, E2, therefore the input side angular contact ball bearing 5 or the outlet side angular contact ball bearing 6 of roughly the same specification (physique) can be used, and rotating ratio i can be regulated.

In other words, though with spin axis L be the center input side ball 53 and outlet side ball 63 the revolution radius about equally, also can regulate rotating ratio i by regulating wrapping angle α 1 and wrapping angle α 2.Also have, because the revolution radius of input side ball 53 and outlet side ball 63 about equally, what can make holding part 7 is shaped as the roughly cylindric of easy formation.

Owing to use input side angular contact ball bearing 5, so the contacting of wheel and first foreign steamer in the input side ball 53 and first, that is, contact with contacting to point of inboard rolling surface 54 of input side and input side outside rolling surface 55.Equally, by using outlet side angular contact ball bearing 6, take turns and second foreign steamer in the outlet side ball 63 and second, that is, the contact of inboard rolling surface 64 of outlet side and outlet side outside rolling surface 65 contacts for point.

Therefore, be that the situation of line contact is compared with rolling element and contacting of rolling surface, input side ball 53, the churning loss when outlet side ball 63 rotates are little, therefore the increase and decrease quick-mounting of present embodiment can be put the 1 increase and decrease speed that is applied to high rotating speed field.

In addition, the increase and decrease quick-mounting of the above-mentioned mode of execution that goes out as example is put each key element of 1: as the sphere diameter Dw1 of the input side ball 53 of rolling element and the sphere diameter Dw2 of outlet side ball 63 is about 4.5mm (Dw1=Dw2=4.5mm), the mean value of the race way diameter E1 of the race way diameter F1 of wheel 51 and input side foreign steamer 52 in the input side, the mean value of the race way diameter E2 of the race way diameter F2 of wheel 61 and outlet side foreign steamer 62 all is about 11mm ((F1+E1)/2=(F2+E2)/2=11mm) in the outlet side, wrapping angle α 1 is about 30 °, wrapping angle α 2 is about 40 °, reduction speed ratio is about 62, but is not limited to this.

In addition, in the above-described embodiment, what illustrate is to be applicable to by regulating the example that wrapping angle α 1 and wrapping angle α 2 regulate rotating ratio i, but also can regulate rotating ratio i by sphere diameter Dw1, the sphere diameter Dw2 of outlet side ball 63 that selects input side ball 53, also can regulate rotating ratio i, not limit especially by selecting race way diameter F1, race way diameter F2.

In the above-described embodiment, the explanation that is to use input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 to carry out as an example, but also can replace angular contact ball bearing and use the deep trouth ball bearing, limit especially.

[second mode of execution]

Below, with reference to figure 5 to Fig. 7 second embodiment of the invention is described.

The basic structure key element that the increase and decrease quick-mounting of present embodiment is put is identical with first mode of execution, but the structure and first mode of execution of the bearing of increase and decrease speed are different.Therefore, only with reference to describing around the bearing of figure 5 to Fig. 7 to present embodiment, the explanation of other structures etc. is omitted.

Fig. 5 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation present embodiment.

In addition, the structure identical with first mode of execution paid with same reference character, it illustrates omission.

As shown in Figure 5, the increase and decrease quick-mounting is put 101 and is had: by external drive source (not shown) by the input shaft 2 that drives with the rotation of regulation rotating speed; Based on the rotating ratio i of regulation and with the output shaft 3 of the rotating speed rotation of slowing down; Make input shaft 2 and output shaft 3 can support the housing 4 of input shaft 2 and output shaft 3 rotatably around spin axis L; Rotation is passed to input side tapered roller bearing (first rolling bearing) 105, outlet side tapered roller bearing (second rolling bearing) 106, the holding part 7 of output shaft 3 from input shaft 2.

As Fig. 5 and shown in Figure 6, input side tapered roller bearing 105 is tapered roller bearings of being located between cap 31 and the input shaft 2, with outlet side tapered roller bearing 106 and holding part 107, the rotating speed of input shaft 2 reduced and is passed to output shaft 3.

Input side tapered roller bearing 105 is provided with: wheel in the input side (wheel in first) 151, input side foreign steamer (first foreign steamer) 152, input side tapered roller (first rolling element) 153.

Wheel 151 is arranged on the ring-shaped member on the circumferential surface of input shaft 2 in the input side, and the radial outside of wheel 151 is provided with the inboard rolling surface of input side (the first inboard rolling surface) 154 of the plane of inclination that input side tapered roller 153 rolls in input side.

Input side foreign steamer 152 is arranged on the ring-shaped member on cap 31 inner peripheral surfaces, is provided with the input side outside rolling surface (first outside rolling surface) 155 of the plane of inclination of input side tapered roller 153 rollings at the radially inner side of input side foreign steamer 152.

As Fig. 5 and shown in Figure 6, outlet side tapered roller bearing 106 is tapered roller bearings of being located between foreign steamer support 11 and the input shaft 2, with input side tapered roller bearing 105 and holding part 107, the rotating speed of output shaft 2 reduced and is passed to output shaft 3.

Outlet side tapered roller bearing 106 is provided with: wheel in the outlet side (wheel in second) 161, outlet side foreign steamer (second foreign steamer) 162, outlet side tapered roller (second rolling element) 163.

Wheel 161 is arranged on the ring-shaped member on the circumferential surface of input shaft 2 in the outlet side, and the radial outside of wheel 161 is provided with the inboard rolling surface of outlet side (the second inboard rolling surface) 164 of the plane of inclination that outlet side tapered roller 163 rolls in outlet side.

Outlet side foreign steamer 162 is arranged on the ring-shaped member on foreign steamer support 11 inner peripheral surfaces, is provided with the outlet side outside rolling surface (second outside rolling surface) 165 of the plane of inclination of outlet side tapered roller 163 rollings at the radially inner side of outlet side foreign steamer 162.

As Fig. 5 and shown in Figure 6, holding part 107 is cylinder-like parts roughly, and is the parts that keep input side tapered roller 153 and outlet side tapered roller 163.

Holding part 107 is the roughly cylinder-like part that extends along spin axis L, the end of input shaft 2 sides has towards the plane of inclination of input shaft 2 directions (left of Fig. 6 to) near spin axis L, and the end of output shaft 3 sides has towards the plane of inclination of output shaft 3 directions (right of Fig. 6) near spin axis.

Also have, on input shaft 2 side ends of holding part 7, be formed with the notch that keeps input side tapered roller 153, the quantity of this notch is corresponding with the quantity of input side tapered roller 1 53.On output shaft 3 side ends, be formed with the notch that keeps outlet side tapered roller 163, the quantity of this notch is corresponding with the quantity of outlet side tapered roller 163.

Below, 101 effect that the increase and decrease quick-mounting of said structure put describes.

At first, to 3 rotation bang path describes from input shaft 2 to output shaft.

As Fig. 5 and shown in Figure 6, the rotation of input shaft 2 is passed to input side tapered roller 153 via wheel 151 in the input side of input side tapered roller bearing 105, and input side tapered roller 153 is the center revolution with spin axis L.The revolution of input side tapered roller 153 is passed to the outlet side tapered roller 163 of outlet side tapered roller bearing 106 via holding part 107.Because outlet side tapered roller 163 is the center revolution with spin axis L, therefore rotation is passed to outlet side foreign steamer 162, and then rotation is passed to output shaft 3 from outlet side foreign steamer 162 via foreign steamer support 11.

The preloading method of input side tapered roller bearing 105 and outlet side tapered roller bearing 106 is identical with first mode of execution, and it illustrates omission.

Below, the rotating speed of input side tapered roller bearing 105 and outlet side tapered roller bearing 106 slowed down to be described.

Fig. 7 is the input side tapered roller bearing of explanatory drawing 6 and the explanatory drawing of outlet side tapered roller bearing structure.

Illustrate that the formula that the rotating speed of input side tapered roller bearing 105 and outlet side tapered roller bearing 106 slows down is identical with employed formula in first mode of execution, therefore, only the definition of each numerical value is described here.

As shown in Figure 7, race way diameter F1 is and the relevant diameter of point of contact of the central part of input side tapered roller 153 and the inboard rolling surface 154 of input side, that is, and and the diameter of a circle of the set of this point of contact.Same race way diameter E1 is and the central part of input side tapered roller 153 and the relevant diameter of point of contact of input side outside rolling surface 155.

Race way diameter F2 is and the relevant diameter of point of contact of the central part of outlet side tapered roller 163 and the inboard rolling surface 164 of outlet side, that is, and and the diameter of a circle of the set of this point of contact.Same race way diameter E2 is and the central part of outlet side tapered roller 163 and the relevant diameter of point of contact of outlet side outside rolling surface 165.

Dpw1 is the central nodule circular diameter of input side tapered roller 153, and Dw1 is the diameter of input side tapered roller 153 central sections.

Dpw2 is the central nodule circular diameter of outlet side tapered roller 163, and Dw2 is the diameter of outlet side tapered roller 163 central sections.

According to said structure, the contacting of inboard rolling surface 154 of input side tapered roller 153 and input side and input side outside rolling surface 155, outlet side tapered roller 163 are that line contacts with contacting of inboard rolling surface 164 of outlet side and outlet side outside rolling surface 165.Therefore, compare with contacting to the situation of some contact of rolling surface with rolling element, the input shaft 2 of the speed reducer 101 of present embodiment and the transmission of torque area between the output shaft 3 increase, thereby can transmit bigger torque.

[the 3rd mode of execution]

Below, with reference to figure 8 to Figure 11 third embodiment of the invention is described.

The basic structure that the increase and decrease quick-mounting of present embodiment is put is identical with first mode of execution, but the structure and first mode of execution of the bearing of increase and decrease speed are different.Therefore, only with reference to describing around the bearing of figure 8 to Figure 11 to present embodiment, the explanation of other structures etc. is omitted.

Fig. 8 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation present embodiment.

As shown in Figure 8, the increase and decrease quick-mounting is put 201 and is had: by external drive source (not shown) by the input shaft 2 that drives with the rotation of regulation rotating speed; Based on the rotating ratio i of regulation and with the output shaft 3 of the rotating speed rotation of slowing down; Make input shaft 2 and output shaft 3 can support the housing 4 of input shaft 2 and output shaft 3 rotatably around spin axis L; Rotation is passed to input side angular contact ball bearing 5, outlet side angular contact ball bearing 6, the holding part 7 of output shaft 3 from input shaft 2; Be used to regulate the torque cam 208 of the precompressed that is applied to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6.

Fig. 9 is the partial enlarged drawing of the torque cam structure of explanatory drawing 8.

As Fig. 8 and shown in Figure 9, torque cam 208 is disposed between input side angular contact ball bearing 5 and the outlet side angular contact ball bearing 6, is used to regulate the precompressed that is applied to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6.

As shown in Figure 9, torque cam 208 is provided with input side cam part 211, outlet side cam part 212, guide rolls 213.

Input side cam part 211 is disk-like members roughly, and it produces the active force along spin axis L direction with outlet side cam part 212 and guide rolls 213.Input side cam part 211 is configured to that wheel 51 contacts in the input side with input side angular contact ball bearing 5, and its central axis is roughly consistent with spin axis L.

On the face relative of input side cam part 211, be formed with and guide rolls 213 contacted steering channels 214 with outlet side cam part 212.Be formed with the plane of inclination on steering channel 214, this plane of inclination is close outlet side cam part 212 from the mediad two end part.

Outlet side cam part 212 is disk-like members roughly, with input side cam part 211 and guide rolls 213, produces the active force along spin axis L direction.Outlet side cam part 212 contacts with the interior wheel 61 of the outlet side of outlet side angular contact ball bearing 6, and its central axis is roughly consistent with spin axis L.

On the face relative of outlet side cam part 212, be formed with and guide rolls 213 contacted steering channels 214 with outlet side cam part 212.Be formed with the plane of inclination on steering channel 214, this plane of inclination is close gradually outlet side cam part 212 from the mediad two end part.

Guide rolls 213 produces the active force along spin axis L direction with input side cam part 211 and input side cam part 211.

Guide rolls 213 is configured between the steering channel 214 of the steering channel 214 of input side cam part 211 and input side cam part 211, can roll with respect to input side cam part 211 and input side cam part 211.

Below, the precompressed regulating method of torque cam is described.

As shown in Figure 9, torque cam 208 is not being applied under the situation of the torque that spin axis L rotates, pre-splenium 32 does not apply precompressed, so guide rolls 213 moves to the darkest position of groove depth of steering channel 214.

In other words, input side cam part 211 and outlet side cam part 212 are in immediate position.

Figure 10 is the partial enlarged drawing of precompressed that explanation is produced by the torque cam of Fig. 9 state when being increased.

Thereafter, as shown in figure 10, if torque cam 208 is applied the torque of rotating around spin axis L, then deviation appears in the phase place between input side cam part 211 and the outlet side cam part 212.That is between the steering channel 214 of the steering channel 214 of input side cam part 211 and outlet side cam part 212 phase difference appears.Guide rolls 213 relative input side cam part 211 and outlet side cam part 212 are rolled, and become with the plane of inclination of steering channel 214 tangent.

Produce the power that makes input side cam part 211 and outlet side cam part 212 directions separated from one another that acts on by guide rolls 213.

In other words, be used for input side cam part 211 along spin axis L to the masterpiece of input shaft 2 sides (left side of Figure 10), this power is passed to the interior wheel 51 of input side of input side angular contact ball bearing 5.Be used for input side cam part 212 along spin axis L to the masterpiece of output shaft 3 sides (right side of Figure 10), this power is passed to the interior wheel 61 of outlet side of outlet side angular contact ball bearing 6.

So, effect is along the power that makes its direction separated from one another on input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6, and this power increases precompressed.

The precompressed that torque cam 208 is applied to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 is roughly proportional with the size of the torque value that is applied to torque cam 208.

According to above structure, the precompressed that is applied to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 can be put the size of 201 torque value and regulates automatically according to being applied to the increase and decrease quick-mounting.Therefore, compare with the method for only regulating the precompressed that is applied to input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6, can prevent reliably that input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 from skidding etc. by pre-splenium 32.

In addition, in the above-described embodiment, what illustrate is that the increase and decrease quick-mounting that torque cam 208 is used to have input side angular contact ball bearing 5 and outlet side angular contact ball bearing 6 is put 201 example, but as shown in figure 11, the increase and decrease quick-mounting that also torque cam 208 can be used to have input side tapered roller bearing 105 and outlet side tapered roller bearing 106 puts 201, limits especially.

[the 4th mode of execution]

Below, referring to figs 12 to Figure 13 four embodiment of the invention is described.

The basic structure that the increase and decrease quick-mounting of present embodiment is put is identical with first mode of execution, but adopts the structure and first mode of execution of compound planetary formula axle different.Therefore, only the dissimilar structure key element of present embodiment is described referring to figs 12 to Figure 13, the explanation of other structural elements etc. is omitted.

Figure 12 is the schematic representation of the increase and decrease quick-mounting interposed structure of explanation present embodiment.

As shown in figure 12, the increase and decrease quick-mounting is put 301 and is had: by external drive source (not shown) by the input shaft 2 that drives with the rotation of regulation rotating speed; Based on the rotating ratio i of regulation and with the output shaft 3 of the rotating speed rotation of slowing down; Make input shaft 2 and output shaft 3 can support the housing 4 of input shaft 2 and output shaft 3 rotatably around spin axis L; Rotation is passed to input side planetary roller portion 305, outlet side planetary roller portion 306, the planet pin (holding part) 307 of output shaft 3 from input shaft 2.

As Figure 12 and shown in Figure 13, input side planetary roller portion 305 is for being located at the planetary roller between housing 4 and the input shaft 2, with outlet side planetary roller portion 306 and planet pin 307, with the rotating speed reduction of input shaft 2 and be passed to output shaft 3.

Input side planetary roller portion 305 is provided with: be arranged on the inboard rolling surface of input side (the first inboard rolling surface) 354 on the circumferential surface of input shaft 2, be formed with input side foreign steamer 352, the input side planetary roller (first rolling element) 353 of input side outside rolling surface (first outside rolling surface) 355.

The inboard rolling surface 354 of input side is arranged on the circumferential surface of input shaft 2, is the face that input side planetary roller 353 rolls.Input side outside rolling surface 355 is arranged on the inner peripheral surface of input foreign steamer 352, is the face that input side planetary roller 353 rolls.Input foreign steamer 352 is configured on the housing 4.

Input side planetary roller 353 is cylinder-like parts roughly, and rolling between the inboard rolling surface 354 of input side and input side outside rolling surface 355 is connected with outlet side planetary roller 363 via planet pin 307.

As Figure 12 and shown in Figure 13, outlet side planetary roller portion 306 is a planetary roller, is located between foreign steamer support 11 and the input shaft 2, with input side planetary roller portion 305 and planet pin 307, the rotating speed of output shaft 2 reduced and is passed to output shaft 3.

Outlet side planetary roller portion 306 is provided with: be arranged on the inboard rolling surface of outlet side (the second inboard rolling surface) 364 on the circumferential surface of input shaft 2, be formed with outlet side foreign steamer 362, the outlet side planetary roller (second rolling element) 363 of outlet side outside rolling surface (second outside rolling surface) 365.

The inboard rolling surface 164 of outlet side is arranged on the circumferential surface of input shaft 2, is the rolling surface of outlet side planetary roller 363.Outlet side outside rolling surface 365 is arranged on the inner peripheral surface of output foreign steamer 362, is the rolling surface of outlet side planetary roller 363.Output foreign steamer 362 is configured on the foreign steamer support 11.

Outlet side planetary roller 363 is cylinder-like parts roughly, and rolling between the inboard rolling surface 364 of outlet side and outlet side outside rolling surface 365 is connected with input side planetary roller 353 via planet pin 307.

As Figure 12 and shown in Figure 13, planet pin 307 is columnar components roughly, is the parts that keep input side planetary roller 353 and outlet side planetary roller 363.

Planet pin 307 extends along spin axis L, disposes input side planetary roller 353 in the end of input shaft 2 sides, disposes outlet side planetary roller 363 in the end of output shaft 3 sides.Input side planetary roller 353 and outlet side planetary roller 363 can be configured to revolve round the sun around running shaft L with planet pin 307.

301 effect that the increase and decrease quick-mounting of said structure put describes.

At first, to 3 rotation bang path describes from input shaft 2 to output shaft.

As Figure 12 and shown in Figure 13, the rotation of input shaft 2 is passed to input side planetary roller 353 via the inboard rolling surface 354 of the input side of input side planetary roller portion 305, and input side planetary roller 353 is the center revolution with spin axis L.The revolution of input side planetary roller 353 is passed to the outlet side planetary roller 363 of outlet side planetary roller portion 306 via planet pin 307.Is the center revolution by outlet side planetary roller 363 with spin axis L, and rotation is passed to outlet side foreign steamer 362, and then rotation is passed to output shaft 3 from outlet side foreign steamer 362 via foreign steamer support 11.

Below, the rotating speed of input side planetary roller portion 305 and outlet side planetary roller portion 306 slowed down to be described.

At wrapping angle α 1 and wrapping angle α 2 is zero (α 1=0, α 2=0) under the situation, be used for illustrating that the formula that the rotating speed of input side planetary roller portion 305 and outlet side planetary roller portion 306 slows down is identical with the employed formula of first mode of execution, therefore, only the definition of each numerical value is described here.

As shown in figure 13, race way diameter F1 is and the contacting part relevant diameter of input side planetary roller 353 with the inboard rolling surface 354 of input side, is the diameter of the inboard rolling surface 354 of input side.Same race way diameter E1 is the diameter of input side outside rolling surface 355.

Race way diameter F2 is and the relevant diameter of contacting part of outlet side planetary roller 363 and the inboard rolling surface 364 of outlet side, that is, and and the diameter of outlet side inboard rolling surface 364.Same race way diameter E2 is the diameter of outlet side outside rolling surface 365.

Dpw1 is the pitch diameter of input side planetary roller 353, and Dw1 is the diameter of input side planetary roller 353.

Dpw2 is the pitch diameter of outlet side planetary roller 363, and Dw2 is the diameter of outlet side planetary roller 363.Wherein, the pitch diameter of input side planetary roller 353 and outlet side planetary roller 363 about equally.

According to above structure, compare with the situation that parts such as having inboard rolling surface 354 of input side and the inboard rolling surface 164 of outlet side are set respectively, can reduce necessary number of components.

Claims

1. an increase and decrease quick-mounting is put, and it is characterized in that, comprising:

First running shaft, it is configured to and can rotates around spin axis;

Second running shaft, it is configured to and can has the cylindric support that covers the described first running shaft end around described spin axis rotation;

Housing, it supports described first running shaft and described second running shaft;

First rolling bearing, it is configured between described first running shaft and the described housing, rotatably mounted described first running shaft;

Second rolling bearing, it is configured between described support and described first running shaft, can support described first running shaft and described second running shaft with the relative rotation;

Pre-splenium, it is arranged on the described housing, applies the precompression with described first rotation shaft side extruding of described second axial rotary;

The transfer part of described second running shaft, its described precompression that will be applied to described second running shaft is passed to described second rolling bearing;

The compression zone of described housing, it bears the described precompression that is passed to described first rolling bearing from described second rolling bearing.

2. increase and decrease quick-mounting according to claim 1 is put, it is characterized in that,

Described first rolling bearing has:

Wheel in first, it is connected with described second rolling bearing and can transmits described precompression, is provided with the first inboard rolling surface, and the described first inboard rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radial outside at least;

First foreign steamer, it is connected with described compression zone and can transmits described precompression, is provided with first outside rolling surface, and described first outside rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radial outside at least;

First rolling element, it is configured to a plurality of and can rolls between the described first inboard rolling surface and described first outside rolling surface,

Described second rolling bearing has:

Second foreign steamer, it is connected with described transfer part and can transmits described precompression, is provided with second outside rolling surface, and described second outside rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radially inner side at least;

Wheel in second, it is connected with described first rolling bearing and can transmits described precompression, is provided with the second inboard rolling surface, and the described second inboard rolling surface has the face of the inclination from described second running shaft of described first axial rotary towards radially inner side at least;

Second rolling element, it is configured to a plurality of and can rolls between the described second inboard rolling surface and described second outside rolling surface.

3. increase and decrease quick-mounting according to claim 2 is put, it is characterized in that,

The rotating ratio i that represents rotation speed n 1 with the rotation speed n 5 of described second running shaft of described first running shaft with the race way diameter E2 of the race way diameter F2 of the race way diameter F1 of the described first inboard rolling surface, the race way diameter E1 of described first outside rolling surface, the described second inboard rolling surface, described second outside rolling surface as follows.

i＝n1/n5

＝E2(F1+F2)/(E2F1-E1F2)

4. increase and decrease quick-mounting according to claim 3 is put, it is characterized in that,

Adjust the race way diameter F1 of the described first inboard rolling surface and the race way diameter E1 of described first outside rolling surface by first wrapping angle that changes described first rolling bearing.

5. increase and decrease quick-mounting according to claim 3 is put, it is characterized in that,

Adjust the race way diameter F2 of the described second inboard rolling surface and the race way diameter E2 of described second outside rolling surface by second wrapping angle that changes described second rolling bearing.

6. put according to each described increase and decrease quick-mounting in the claim 2 to 5, it is characterized in that,

At least one side in described first rolling element and described second rolling element is roughly spherical.

7. put according to each described increase and decrease quick-mounting in the claim 2 to 5, it is characterized in that,

At least one side in described first rolling element and described second rolling element is roughly the tapered roller shape.

8. put according to each described increase and decrease quick-mounting in the claim 1 to 7, it is characterized in that,

Described the 3rd rolling bearing of described second running shaft of rotatable supporting and the 4th rolling bearing are arranged along described spin axis direction and are arranged between described second running shaft and the described housing.

9. increase and decrease quick-mounting according to claim 8 is put, it is characterized in that,

Described the 4th rolling bearing is to have a roughly roller bearing of cylindric rolling element,

Described pre-splenium is taken turns all round to described the 3rd rolling bearing via of described the 4th rolling bearing and is applied precompression,

Described the 3rd rolling bearing is passed to described second running shaft with described precompression.